Daniel smith



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Letters Patent No. 80,314, dated July 28, 1868.

IMPROVEMENT IN PLOWS.

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. TO ALL WHOM IT MAY CONCERN:

Be it known that I, DANIEL SMITH, of Cedar Falls, in the county of BlackHawk, and State of Iowa, have invented a new and improved Plow; and I dohereby declare that thefollowing is a full, clear, and exact descriptionthereof, reference being had to the accompanyihg drawings, making a partof this specification, in which-- Figure 1 is a perspective view of myplow. v

Figure 2 is an elevation of the mould-board side of the plow.

Figure 3 is an enlarged horizontal section, taken atthc point indicatedby the line go a: in fig. 2.

Figure 4 is a perspective view of the" front and the rear clampingplates for confining the mould-board in place. v

Similar letters of reference indicate corresponding parts in the severalfigures.

:The object of this invention is to construct mould-boards for plows ofa substance which will be more durable than metal, and which will alwayspresent a smoother surface and offer less resistance to the earth thanmould-boards made of metal, as will be-hereinafter described.

To enable others skilled in the art to understand my invention, I willdescribe its construction and operation. f

In the accompanying drawings, A represents a mould-board, which I makeentirely of glass, and of any suitable shape, by taking plates of glassof the proper size and pressing them upon a suitable form whilein aheated state. The glass mould-boards should be properly annealed, so asto render them less brittle, and not liable to break under ordinaryusage.

The edges of the mould-boards may be slightly bevelled, for receivingthe clampiug-plates at, and for forming a close joint at the junction ofthe lower straight edges of the boards with the shares (1. The share dis made of metal, and suitably secured at its front part to thelandside-plate e, and at its rear part to the lower end of theplow-stilt orihaudle B. The handle B is secured at its lower end to thelandside-plate e, and above this plate the handle is secured rigidly tothe rear end of the plow-beam G, as shown infig. 1. The two handles BBare braced against lateral strain by the cross-bars ff, and the handleB is further sustained'by the forward diagonal braceg, which connectsthis handle to the beam 0.

In front of the handle B, a standard, D, is securely bolted to thelandside-plate e, and extended upward through the beam C, to which thestandard is secured'by a pin or key, ab shown in figs. 1 and 2.

Th'eclamping-plate a is, in cross-section, of a v-shape, and is rigidlybolted at one end to the share cl, and at the other end to the standardD. The clamping-plate b is similarly constructed, and secured at itslower end to-tlre share d, and at and near its upper end to the frontedge of the handle B. These two plates, at and b, embrace the edges ofthe glass mould-board, and confine it in place.

To prevent the mould-board from slipping upward, the upper ends a b ofsaid plates extendover the upper corners of said boardpas indicated infigs. 1 and 4. Thelower edge of the mould-board abuts snugly against theupper edge of the share d, and the surfaces of the mould-board and shareare flush at such junction.

Thus, it will be seen that the mould-board can be rigidly secured inplace upon the plow without making holes through it, which holes wouldbe liable to crack the glass or weaken it at the points of attachment.

I have thus described one practical mode of securing a glassmould-boardto a plow, but I do not desire to confine my invention to such mode, asother modes equivalent to this may be adopted.

A glass mould-board will always present a smooth surface to the earth,and pass through itwith less friction than metal. It will be moredurable than metal, when used'upon land which is free from stones, and,when properly mounted, it will not be liable to break. Such amould-board will not rust, nor allow moist, clayey soil to adhere to it.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is

. A mould-board for plows, which is made entirely of glass,substantially as described.

. The combination of a glass mould-board and a metal share,substantially as described.

. Securing a glass mould-board to a plow-frame, by means of clamps a I),or their equivalents, substantially as described.

4 .The construction of. the. side-clamps a t with curved overhanginglips-Mb, substantially as described.

DANIEL SMITH.

Witnesses:

J. 13. Powers, W. B. I'IAMILL.

